package com.hill;

import  java.lang.String;
import java.util.Properties;

public class gitxx {
    public static  void main(String[] args){
        Properties props=System.getProperties();
        System.getProperties().list(System.out);
        System.out.println("hello,world!");
        System.out.println(props.getProperty("user.name"));
        System.out.println(props.getProperty("java.library.path"));
        char c= 'a';
        int e= c+2;
        System.out.println(e);
        System.out.println((char)e);

    }
}
